Manufacture of carbonic-acid compounds of ammonia.



' ammonium carbamate, and they can be in- UNITED strArns ma n our. BOSCH, or nunwIesnArnmoN-rnn-nmnn, GERMANY, ASSIGNOR "r0 sanrscnn ANILIN a sore FABRIK, or LUnwIesHArmI-on-rnn-amue, GERMANY, a conso- BATION' 0F vGERMANY.

manuracmn or (masonic-non) comrounns or Ammonia.

I No Drawing.

of the German Empire, residing at Ludwigs hafen-on-the-Rhine, Germany, have invented new and useful Improvements in the Manu-' facture of Carbonic-Acid Compounds of Ammonia, of which the following is a specification.

I have found that carbonic acid com pounds of ammonia, especially ammonium carbamate, ammonium carbonate or bicarbonate or mixtures ofthese salts, are easily produced, even when working in a large scale, by introducin ammonia and carbon dioxid into an indi erent liquid that does not mix with water. As such liquidsI mention in particular liquid hydrocarbons or mixtures ofhydrocarbons for instance, petroleum or the benzene hydrocarbons or the like. The gases to be introduced into the indifferent liquid that does not mix with water may be in thedry state in which case pure ammonium carbamate will be formed or they may contain water. vapor giving rise to the formation of ammonium carbonate, or bicarbonate, or of mixtures thereof with troduced either simultaneously or sepa rately. The liquid is preferably cooled during the introducing of the said gases. In this way it is possible to obtain the ammonium salts in large quanties in small apparatus, for, by aid of the liquid medium it is easily possible to remove the heat of the reaction, since in the presence of the liquids no crusts form as is the casein their absence, which crusts, when formed on the Specification of Letters Patent.-

.the liquid can easily be usedover and over again. The separated salts even if they do contain small quantities of hydr ocarbons can nevertheless be usedfor conversion into urea.

Now what I claim is:' f

1. The process of manufacture of carbonic acid compounds of ammonia by introducing ammonia and carbon dioxid into an indifferent liquid that does not mix with water.

2. The process of manufacture of carbonic acid compounds of ammonia by introducing ammonia and carbon dioxid intoavesselcom taining a cooled indifferent liquid that does not mix with water. v

3. The process of manufacture of carbonic acid compounds of ammonia by introducin ammonia and carbon dioxid into a vesse containing a cooled liquid hydrocarbon.

4. The process of manufacture of carbonic I acid compounds of ammonia by introducing Patented Jan. 9, 191a.

Application flled'April 8, 1915. Serial No. 20,047. v

6. The process of manufacture of carbonic acid compounds of ammonia by introducing ammonia and carbon dioxid 1n the presence of water vapor into a vessel containing a.

cooled liquid hydrocarbon.

In testimony whereof I have hereunto set my hand in the presence f two subscribing witnesses. y CARL BOSCH. Witnesses: r 1

ARTHUR Dnnonvmnn, O. INNESS BROWN. 

